NKW FOSSIL REPTILES, 863 



Scymnognathus may prove to be related to Scymnosmtrus. 

 The dental forniulfe are practically the same in the two genera, 

 but ticymnoscmrvs seems to be a highei' type of 'riierocephalian, 

 and the shape of the snout and lower jaw diflers sufficiently 

 markedly to justify one in keeping the genera distinct. 



^LUROSAURIIS STRIA'UUENS, Sp. n, (PI. XCI. fig. 7.) 



The imperfect snout which forms the type of this new species 

 was discovered by me at Kuilsj)oort, near Beaufort West, at a 

 horizon which is proljably 500 feet above the town. 



It is a sm-dler species than yE.felinus, and in addition differs 

 from this and the other known species in the relatively small size 

 of the teeth, in the feeble development of the serrations, and in the 

 incisors and canine having feeble verticid i-idges on the enamel. 



So far as preserved there is a pretty close agreement in the 

 structure of the bones of the snout with those of ))reviously 

 described species. The septoma.xillary is larger than usual. The 

 mandible has a bioad angular chin. 



The incisors are small, rounded, pointed teeth, placed so near 

 each other as to be almost touching. Those wliose crowns are 

 preserved (3rd, 4th, .5th) have the enamel folded into about half 

 a dozen vertical corrugations. The 5th tooth has fine serrations 

 on its posterior edge. The space occupied by the five incisors is 

 16 mm. The diastema between the 5th incisor and the canine is 

 7 mm. 



The canine is long and slender. The base measures antero- 

 posteriorly 7 mm, and the height of the crown as preserved is 

 14 mm. It originally probably measured about 20 mm. The 

 molars are small with only faint indications of posterior sensations. 

 Two are well pieserved and there are i-emains of the other two. 

 Probably 5 is the complete number, which would make the dental 

 formula agree with the other species of uElurosaurus. The four 

 preserved molars measure 10 mm,, and the front one is only 9 mm. 

 behind the canine, 



Pristerognathus platyrhinus, sp, n, (PI. XOI. fig. 8.) 



The specimen which I take as the type of this new species is an 

 imperfect snout found by Mr. Whaits at Grootfontein , about 12 

 miles to the west of Beaufort West, and probably from the upper 

 part of the Fareia-saums-Zone. The specimen consists of the 

 front half of the skull. It is broken into three pieces and the 

 upper nasal region is missing. The matrix is extremely hard and 

 difficult to clear off, but most of the characters can be satisfactorily 

 made out. 



In the large majority of Therocephalians the snout is deeper 

 than broad. In this specimen the snout is broad and flat, and the 

 lower jaw comparatively straight and with very little of the usual 

 upcurving in the canine and incisor region. The widest part of 

 the snout is immeiliately above the canine, where it measures 

 55 mm., and on the same })lune the height of the snout is 40 mm. 



